Early US Navy RTTY Equipment
1940's & early 1950's

RTTY Receiving Equipment

 FRA  (400 kc IF input demod)
 - for use with RBB and RBC rcvrs

 FRA (CRV-35122) manual is NAVSHIPS 900,613
 info in NAVPERS 10190-A (ET2 training manual vol. 1)

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 CRV-10563 couples FRA  
 demod to RBB or RBC rcvr IF

 FRC  (AF input dual diversity demod)
 - for use with RBP rcvr

FRC-1 includes CHG-50212A mixer, CHG-20345A keyer, CHG-53215A filter
Manual is NAVSHIPS 900,718

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 FRE  (455 kc IF input triple diversity demod)
  - for use with RDM rcvr

FRE (CRV-35104) manual is NAVSHIPS 95100

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FRF  (400kc-470kc IF input dual channel demod)
 - for use with RBB, RBC, or RDM rcvrs

FRF consists of CW-35118 converter, CW-35117 osc, CW-20457 p/s
Manual is NAVSHIPS 900,208

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FRH  50kc IF input dual channel demod
  - for use with RBP or RCP rcvrs

FRH consist of CW-35119 converter, CW-35117 osc, CW-20457 p/s
Manual is NAVSHIPS 900,358

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RTTY Transmitting Equipment

FSA frequency shift keyer

 mixes 200 kc FSK signal with xmtr oscillator input 
 1.0 to 6.7 mc, 2w output to xmtr
 FSA (CW-35060) manual is NAVSHIPS 900,754

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FSB frequency shift keyer

 mixes 200 kc FSK signal with xmtr oscillator input 
 1.0 to 6.7 mc, 2w output to xmtr 
 FSB (CYV-35062) manual is NAVSHIPS 900,928
 info in NAVPERS 10190-A (ET2 training manual vol. 1) 

 

 fsb-01.jpg (56751 bytes)

FSD frequency shift keyer

 crystal controlled exciter provides
 2 to 5 mc, 1.5w output to xmtr
 includes CYV-35065 keyer and CYV-20349 p/s
 FSD manual is NAVSHIPS ???

 

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MX-1262/URT
(CBOT-23510) 		FSK Coupling Adapter for TBL transmitter connects TBL to FSA, FSB, KY-30/GRT, KY-58/GRT, KY-75/SRT or similar keyer

section 1 couples xmtr master oscillator to FSK keyer.

section 2 couples FSK keyer output to xmtr's first IPA tubes 

NAVSHIPS 91885

manuf by American Electronic Laboratories Inc.

CYV-23510 FSK Coupling Adapter for TBK & TBM transmitters This is a small unit installed into a TBK (or TBM) transmitter to allow easy hookup of an external frequency shift keyer. Has two tuned RF transformers, one to couple the TBK osc to the 75 ohm FSK input, and the other to couple the 75 ohm FSK output to the TBK IPA. Controls are a common tuning knob for both transformers plus a switch to bypass the FSK. NAVSHIPS 900,206

manuf by Press Wireless